/*************************************************************************************************
 * This Example sends harcoded data to Ubidots and serves as example for users that has devices
 * from Particle
 * 
 * This example is given AS IT IS without any warranty
 * 
 * Made by Jose García.
 *************************************************************************************************/

/****************************************
 * Include Libraries
 ****************************************/


/****************************************
 * Define Constants and objects
 ****************************************/


const char * HTTPSERVER = "things.ubidots.com";
const int HTTPPORT = 80;

const char * VARIABLE_LABEL = "my-var"; // Replace for your variable label
const char * USER_AGENT = "Particle-test";
const char * VERSION = "0.1";
const char * TOKEN = "...."; // Put here your TOKEN

const char * DEVICE_LABEL = "my-device"; // Replace for your device label
const char * VARIABLE_LABEL_1 = "var-test-1";

// Space to store values to send
char payload[700];
char topic[1000];

// TCP Object
TCPClient clientUbi;

/****************************************
 * Auxiliar Functions
 ****************************************/

void SendToUbidots(char* payload) {

      int i = strlen(payload); 
      
      /* Builds the request POST - Please reference this link to know all the request's structures https://ubidots.com/docs/api/ */
      sprintf(topic, "POST /api/v1.6/devices/%s/?force=true HTTP/1.1\r\n", DEVICE_LABEL);
      sprintf(topic, "%sHost: things.ubidots.com\r\n", topic);
      sprintf(topic, "%sUser-Agent: %s/%s\r\n", topic, USER_AGENT, VERSION);
      sprintf(topic, "%sX-Auth-Token: %s\r\n", topic, TOKEN);
      sprintf(topic, "%sConnection: close\r\n", topic);
      sprintf(topic, "%sContent-Type: application/json\r\n", topic);
      sprintf(topic, "%sContent-Length: %d\r\n\r\n", topic, i);
      sprintf(topic, "%s%s\r\n", topic, payload);
    
      /* Connecting the client */
      clientUbi.connect(HTTPSERVER, HTTPPORT); 
      
      Serial.println(topic);
    
      if (clientUbi.connected()) {
        /* Sends the request to the client */
        clientUbi.print(topic);
        Serial.println("Connected to Ubidots - POST");
      } else {
        Serial.println("Connection Failed ubidots - Try Again"); 
      }  
        
      /* Reads the response from the server */
      while (clientUbi.available()) {
        char c = clientUbi.read();
        Serial.print(c); // Uncomment this line to visualize the response on the Serial Monitor
      }
    
      /* Disconnecting the client */
      clientUbi.stop();
}

 /****************************************
 * Main Functions
 ****************************************/


void setup() {
    Serial.begin(115200);
}

void loop() {
    /* Adapt your value array following the structure specified at https://ubidots.com/docs/api/index.html#send-values-to-one-variable */
  
    /*---- Simulates the values of the sensors -----*/
    float sensor_value_1 = random(0, 1000)*1.0;
    float sensor_value_2 = random(0, 1000)*1.0;
    float sensor_value_3 = random(0, 1000)*1.0;
    float sensor_value_4 = random(0, 1000)*1.0;
    float sensor_value_5 = random(0, 1000)*1.0;
    
    /*---- Simulates timestamps  -----*/
    long timestamp = Time.now(); // Time in seconds
    
    /*---- Constructs the payload ----*/
    //Important: Avoid to send a very long char as it is very memory space costly, send small char arrays

    sprintf(payload, "{\"");
    sprintf(payload, "%s%s\":[{\"value\":%f, \"timestamp\":%lu%s},", payload, VARIABLE_LABEL_1, sensor_value_1, timestamp, "000"); // Sends original timestamp
    sprintf(payload, "%s{\"value\":%f, \"timestamp\":%lu%s},", payload, VARIABLE_LABEL_1, sensor_value_2, timestamp, "100"); // Sends timestamp with a difference of 100 ms
    sprintf(payload, "%s{\"value\":%f, \"timestamp\":%lu%s},", payload, VARIABLE_LABEL_1, sensor_value_3, timestamp, "200"); // Sends timestamp with a difference of 200 ms
    sprintf(payload, "%s{\"value\":%f, \"timestamp\":%lu%s},", payload, VARIABLE_LABEL_1, sensor_value_4, timestamp, "300"); // Sends timestamp with a difference of 300 ms
    sprintf(payload, "%s{\"value\":%f, \"timestamp\":%lu%s}", payload, VARIABLE_LABEL_1, sensor_value_5, timestamp, "400"); // Sends timestamp with a difference of 400 ms
    sprintf(payload, "%s]}", payload);
    
    /* Calls the Ubidots Function POST */
    SendToUbidots(payload);
    
    delay(1000);
}